CN110630312A - Mine explosion-proof well lid opening and closing control device and control method - Google Patents
Mine explosion-proof well lid opening and closing control device and control method Download PDFInfo
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- CN110630312A CN110630312A CN201910984569.9A CN201910984569A CN110630312A CN 110630312 A CN110630312 A CN 110630312A CN 201910984569 A CN201910984569 A CN 201910984569A CN 110630312 A CN110630312 A CN 110630312A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 49
- 238000004880 explosion Methods 0.000 claims abstract description 22
- 230000001960 triggered effect Effects 0.000 claims abstract description 11
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 description 14
- 238000009423 ventilation Methods 0.000 description 11
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000004146 energy storage Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/16—Shaft covers
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Abstract
The invention relates to a mine explosion-proof well lid opening and closing control device and a control method, wherein the mine explosion-proof well lid opening and closing control device comprises a winding and unwinding drum which is connected with the upper end of a balance weight balance block through a pull rope and driven by a winding and unwinding motor, a rope unwinding trigger switch which is triggered by a tray at a high position to control the winding and unwinding motor to reversely unwind a rope is arranged on an assembly groove, a rope winding trigger switch which is triggered by the tray at a low position to control the winding and unwinding motor to forwardly wind the rope is also arranged on the assembly groove, and the rope unwinding trigger switch and the rope winding trigger switch are arranged up and down. The invention solves the problems that the manual labor intensity is high and the well lid closing time is delayed easily after explosion due to the fact that a well lid opening and closing control device in the prior art needs to manually operate the balance weight to lift.
Description
Technical Field
The invention relates to a mine explosion-proof well lid opening and closing control device and a control method in the field of mine safety.
Background
The upper opening of the return air shaft of the coal mine must be provided with an explosion-proof facility, the common explosion-proof measure is to arrange an explosion-proof well cover at the well opening, the function of the explosion-proof well cover is that the explosion-proof well cover is automatically opened under the impact of high-pressure air waves when gas or coal dust explosion happens in the well, so as to protect a main ventilator from being damaged, and under the normal condition, the explosion-proof well cover is airtight so as to prevent short circuit of wind flow.
The explosion-proof well lid of current explosion-proof well lid is like "explosion-proof well lid switching device of mine" that chinese patent CN107905829A discloses, including well lid and the assembly groove that is located the well head both sides, fixedly connected with U-shaped frame on the well lid, the both ends of U-shaped frame all stretch into in the assembly groove, the both ends of U-shaped frame all are connected with the tray, the bottom of assembly groove is provided with the bottom spring that can contact with the tray bottom, the middle swing joint of assembly groove has the cardboard, the end of cardboard can stretch into the assembly groove and also can follow the assembly groove and withdraw, the upper portion of assembly groove is equipped with the dog, set up the first through-hole that is used for passing with the U-shaped frame on the dog, the second through-hole has been seted up on the dog, the traveller has passed in the second through-hole. When the manhole cover is used, under normal work, negative pressure is formed in the manhole cover, the sum of the gravity of the manhole cover and the gravity of the U-shaped frame is less than the elasticity of the bottom spring and less than the gravity of the manhole cover, the gravity of the U-shaped frame and the atmospheric pressure (namely the suction force of a negative pressure environment on the inner side of the manhole cover on the manhole cover), and the manhole cover is tightly pressed on a wellhead; when an explosion occurs, the well lid and the U-shaped frame can be lifted upwards under the impact of the explosion, the well lid is quickly opened, the tray is separated from the clamping plate, the clamping plate is automatically retracted into the side wall of the assembling groove from the assembling groove, the tray continuously moves upwards to touch the balance weight, and pushes the balance weight to move upwards until the balance weight moves upwards to touch the stop block and then descends; after explosion happens, because the clamping plate is still in a state of retracting from the assembly groove at the moment, the operator controls the rope to loosen so that the balance weight hammer descends, the balance weight hammer drives the well cover and the U-shaped frame to descend, the sum of the gravity of the well cover, the gravity of the U-shaped frame and the gravity of the balance weight hammer is larger than the elastic force of the bottom spring, so that the well cover can be pressed onto the well mouth again, after the well cover is pressed onto the well mouth, the operator pulls the rope to lift the balance weight hammer to a certain height, then pushes the clamping plate to enable the tail end of the clamping plate to be deep into the assembly groove, and the clamping; when the ventilation blower sends the trouble, the inside and outside atmospheric pressure of well lid equals, because of the gravity sum of the gravity of well lid and U-shaped frame < the elasticity of bottom spring, the tray can be automatic jack-up to bottom spring for U-shaped frame drives the well lid and upsets, and at this moment, can utilize natural wind pressure to realize the mine ventilation.
In the prior art, the balance weight mainly plays a role in exerting acting force on the U-shaped frame to reset the well lid after explosion is finished, and when a fan does not work, the opening of the well lid cannot be influenced, in order to realize the purpose, an operator needs to manually operate the lifting of the balance weight through a rope, a clamping plate needs to be manually operated, the labor intensity is high, in addition, after the explosion is finished, the well lid often needs to be rapidly closed to realize ventilation in a well, then in the prior art, the well lid can be closed again only by manually operating the balance weight, the operator needs to be in place in time and then operates, the closing time period of the well lid is greatly limited, the ventilation safety under the well is influenced, meanwhile, the operator slowly falls the balance weight onto a supporting plate, the balance weight has no kinetic energy function, when the balance weight falls onto the supporting plate, the supporting plate weight is in a relatively static state, therefore, the well lid can be reset only under the condition that the sum of the gravity of the well lid, the gravity of the U-shaped frame and the gravity of the balance weight is larger than the elastic force of the bottom spring, so that the weight of the balance weight is required to be larger, the cost is increased, and the operation of an operator is more difficult.
Disclosure of Invention
The invention aims to provide a mine explosion-proof well lid opening and closing control device, which solves the problems that in the prior art, the well lid opening and closing control device needs to manually operate a balance weight to lift, so that the labor intensity of workers is high, and the well lid closing time is delayed easily after explosion.
In order to solve the technical problems, the technical scheme of the opening and closing control device for the mine explosion-proof well lid is as follows:
a mine explosion-proof well lid opening and closing control device comprises a well lid and assembling grooves located on two sides of the well lid, wherein a balance weight support is fixed on the well lid and comprises a cross arm connected with the well lid and vertical arms arranged at two ends of the cross arm, the lower ends of the vertical arms extend into the assembling grooves, the balance weight support further comprises a tray connected to the bottoms of the vertical arms, a bottom spring used for being in contact with the bottom of the tray is arranged at the bottom of the assembling groove, and when the well lid is covered on a well mouth, the tray is in a low position; after mine explosion, the tray moves upwards to a high position with zero speed, a counterweight balance block capable of moving up and down in the assembly groove is arranged on the upper side of the tray in the assembly groove, the mine explosion-proof well lid opening and closing control device further comprises a winding and unwinding drum which is connected with the upper end of the counterweight balance block through a pull rope and driven by a winding and unwinding motor, a rope unwinding trigger switch which is used for being triggered by the tray at the high position to control the winding and unwinding motor to reversely unwind is arranged on the assembly groove, a rope winding trigger switch which is used for being triggered by the tray at the low position to control the winding and unwinding motor to forwardly wind and unwind is further arranged on the assembly groove, and the rope unwinding trigger switch and the rope winding trigger switch are vertically
The top of the assembling groove is provided with an assembling groove baffle plate which is used for being matched with the counterweight balance block in a blocking mode so as to limit the upward movement limit of the counterweight balance block, a vertical arm through hole is formed in the middle of the assembling groove baffle plate, and a pull rope through hole is formed in the periphery of the vertical arm through hole in the assembling groove baffle plate.
The balance weight is of an annular structure, and the vertical arm penetrates through the center of the balance weight.
Receive rope trigger switch and put rope trigger switch and set up on the lateral wall of assembly groove, be provided with vertical guide way between receiving rope trigger switch and putting rope trigger switch on the cell wall of assembly groove, the tray is including being located the tray body of assembly groove, is connected with the trigger arm that is used for and receives rope trigger switch, puts rope trigger switch contact that stretches out by vertical guide way on the tray body.
The technical scheme of the control method in the invention is as follows:
the mine explosion-proof well lid opening and closing control device has the following four working modes, namely, the inner side of a well lid is in a negative pressure environment, the self weight of the well lid, the self weight of a balance weight support and the suction force of the negative pressure of the inner side of the well lid to the well lid are greater than the acting force of a bottom spring to the balance weight support, the self weight of the well lid and the self weight of the balance weight support, the well lid is sealed on a well head, a tray is in a low position to trigger a rope collecting trigger switch, the rope collecting trigger switch controls a collecting and releasing motor to collect; secondly, when explosion occurs in a mine, a positive pressure environment is formed on the inner side of the well cover, the well cover and the counterweight support move upwards under impact, the tray drives the counterweight balance block to move upwards continuously to a high position after moving upwards, the tray triggers the rope releasing trigger switch, and the rope releasing trigger switch controls the reverse rope releasing of the releasing motor; thirdly, after the mine is exploded, the well cover, the counterweight support and the counterweight balance block move downwards together, kinetic energy generated by free falling bodies of the well cover, the counterweight support and the counterweight balance block impacts a bottom spring until the well cover covers the well mouth, the tray is in a low position to trigger a rope winding trigger switch, the rope winding trigger switch controls a winding and unwinding motor to wind ropes in a forward rotation mode, and the counterweight balance blocks are located on the upper side of the tray at intervals to achieve resetting of the counterweight balance block; in the first, second, the third kind mode of operation, the mine ventilation machine all normally works, and the fourth kind, the mine ventilation machine is out of work, and well lid dead weight + counter weight support dead weight is less than the effort of bottom spring to the counter weight support, and the well lid rebound opens the well head, and the tray interval is located the downside of counter weight balancing piece.
The invention has the beneficial effects that: in the invention, a rope releasing trigger switch which is triggered by a tray at a high position and a rope collecting trigger switch which is triggered by a tray at a low position are arranged, when a well lid normally covers a well mouth, the rope collecting trigger switch is triggered by the tray, the rope collecting trigger switch controls a rope collecting and releasing motor to rotate forwards to collect a rope, and a counterweight balance block is pulled to the upper side of the tray at the moment and does not generate acting force on the tray, so that if a mine ventilator does not work at the moment, the well lid and a counterweight support can be smoothly bounced under the action of a bottom spring to open the well mouth and keep ventilation; meanwhile, if the mine is exploded, the tray moves upwards, no counter weight balance block blocks in the first stage, the well cover can move upwards quickly to realize pressure relief, the tray and the counter weight balance block move upwards together in the second stage to reduce kinetic energy of the upward movement of the tray, when the tray moves to a high position, the tray triggers the rope releasing trigger switch, the rope releasing trigger switch controls the releasing and releasing motor to release the rope reversely, the stretching is in a loose state completely, the gravity of the counter weight balance block can act on the tray completely, after explosion, the wellhead is released, the well cover, the counter weight support and the counter weight balance block move together in a falling body mode to generate kinetic energy to impact the bottom spring, the kinetic energy is converted into elastic potential energy of the bottom spring, the well cover can smoothly overcome the spring acting force to cover the wellhead, the tray moves to a low position to trigger the rope releasing and releasing of the counter weight balance block is realized by pulling, the balance weight is characterized in that kinetic energy generated by free falling bodies of the well cover, the balance weight support and the balance weight is converted into potential energy of the spring, the balance weight support is firstly placed on the spring in the prior art, then an operator slowly puts down the balance weight and completely compresses the spring by gravity. According to the invention, after explosion, the process of reclosing the well head by the well cover does not need manual operation, so that the labor intensity is reduced, the limitation of manual operation time is avoided, and after the well cover is exploded, the well cover can be automatically covered on the well head again, so that the problem of influencing the closing time of the well cover is avoided.
Drawings
FIG. 1 is a schematic view of the opening and closing control device for the explosion-proof well cover of the mine in the invention when the mine ventilator works normally;
FIG. 2 is a schematic view of the tray moving up to the vicinity of the counterbalance weight after a mine explosion;
FIG. 3 is a schematic view of the tray of FIG. 2 as it continues to move upwardly to the raised position;
fig. 4 is a schematic diagram of the state of the mine explosion-proof well lid opening and closing control device after the mine fan does not work.
Detailed Description
An embodiment of the mine explosion-proof well lid opening and closing control device is shown in figure 1 ~ 4, and comprises a well lid 2 used for being covered on a well mouth 1, assembly grooves 21 are arranged on two sides of the well lid 2, a counterweight support is fixed on the well lid and comprises a cross arm 3 connected with the well lid 2 and vertical arms 4 arranged at two ends of the cross arm 3, the lower end of each vertical arm 4 extends into the assembly groove 21, a tray 18 is fixed at the bottom of each vertical arm 4, a bottom spring 14 used for being in contact with the bottom of the tray is arranged at the bottom of each assembly groove, a counterweight balance block 16 capable of moving up and down in the assembly groove is arranged on the upper side of the tray in the assembly groove, the counterweight balance block 16 is of an annular structure, the vertical arm 4 penetrates through the center of the counterweight balance block, the mine explosion-proof well lid opening and closing control device further comprises a winding drum 6 connected with the upper end of the counterweight balance block through a pull rope 17 and driven by a stepping motor, the winding drum 11 is arranged at the upper end of the winding drum, the winding drum is arranged at the upper end of the tray, a.
The top of the assembling groove is provided with an assembling groove baffle plate 19 which is used for being matched with the counterweight balance block 16 in a blocking mode to limit the upward movement limit of the counterweight balance block, a top spring 7 is arranged on the assembling groove baffle plate 19, a vertical arm through hole is formed in the middle of the assembling groove baffle plate, and a pull rope through hole is formed in the periphery of the vertical arm through hole in the assembling groove baffle plate. As shown in fig. 1, when the well lid 2 is covered on the wellhead 1, the tray 18 is in a low position, after the mine explosion, the tray 18 moves upwards until the balance weight balance block is blocked by the assembly groove baffle, when the speed of the tray is reduced to zero, the tray is in a high position, the assembly groove is provided with a rope releasing trigger switch 8 which is used for being triggered by the tray in the high position to control the reverse rope releasing of the releasing motor, the assembly groove is also provided with a rope releasing trigger switch 13 which is used for being triggered by the tray in the low position to control the forward rope releasing of the releasing motor, and the rope releasing trigger switch 8 and the rope releasing trigger switch 13 are vertically arranged. In this embodiment, receive rope trigger switch 13 and put rope trigger switch 8 and set up on the lateral wall of assembly groove, be provided with vertical guide way 9 on the cell wall of assembly groove between receiving rope trigger switch and putting rope trigger switch, the tray is including being located the tray body of assembly groove, is connected with on the tray body by vertical guide way stretch out be used for with receive rope trigger switch, put rope trigger switch contact trigger arm 12. The rope winding trigger switch is connected with the winding and unwinding motor in a control mode to control the winding and unwinding motor to rotate forwards, and the rope unwinding trigger switch is connected with the winding and unwinding motor in a control mode to control the winding and unwinding motor to rotate backwards.
In the invention, the winding and unwinding motor is a stepping motor, when the tray triggers the rope unwinding trigger switch, the winding and unwinding motor rotates by the number of fixed circles, for example, in the embodiment, the winding and unwinding drum only needs to pay out two circles, and when the tray triggers the rope winding trigger switch, the winding and unwinding drum takes up two circles.
In the invention, when the tray is in a low position, the weight of the well lid, the weight of the counterweight support and the acting force of the bottom spring on the well lid are less than the weight of the well lid, the weight of the counterweight support and the acting force of the negative pressure on the inner side of the well lid on the well lid.
The invention can realize the following working states that 1, when no explosion is generated in a mine, the mine ventilator normally works, the well cover is covered at the well opening, as shown in figure 1, the tray 18 is at a low position, the acting force of the bottom spring 14 on the counterweight bracket is less than the weight of the well cover, the weight of the counterweight bracket and the acting force of the negative pressure at the inner side of the well cover on the well cover, and the well cover can be firmly covered at the well opening; 2. when the mine in the explosion, mine ventilation fan still normally works, the explosion makes the inboard malleation environment that forms of well lid, receive the air current impact effect, well lid 2, counter weight support rebound together, at the beginning of removing, counter weight balancing piece 16 is located the upside of tray 18, 16 do not influence the shifting up of tray 18 of counter weight balancing piece, pressure release can be opened fast to well lid 2, when the tray removed near the counter weight balancing piece, tray magnetic pole and counter weight magnetic pole when the tray, the tray magnetic pole and counter weight magnetic poleGenerating an opposite acting force to buffer the movement of the tray, and avoiding the damage of the counterweight balance block due to the direct impact of the tray, as shown in fig. 2, then the tray drives the counterweight balance block to move upwards until the counterweight balance block impacts the assembly groove baffle, the speed of the tray is reduced to zero, and the tray is at a high position at the moment, as shown in fig. 3, on one hand, the top spring 7 can buffer the impact of the counterweight balance block to realize 'soft landing', in addition, the top spring 7 realizes energy storage in the compression process, when the tray is at the high position, the trigger arm triggers the rope releasing trigger switch, and the releasing and releasing motor drives the releasing and releasing reel to rotate the rope; 3. when well head pressure release is accomplished, top spring 7 release energy, and counter weight balancing piece and tray move down fast, move the in-process down, because the stay cord is in the pine completely and takes off the state, consequently on the weight of counter weight balancing piece acted on the tray completely, well lid, counter weight support and tray produced kinetic energy because of the falling body motion, and assault the spring, can make the well lid cover again on the well head, MV2≥KX2In the formula, M represents the weight of the well lid, the counterweight support and the counterweight balance block, V represents the speed when the tray moves downwards to be in contact with the spring, the speed is related to the falling height of the tray, K represents the elastic coefficient of the bottom spring, X represents the deformation length of the bottom spring (namely the length of the free state of the bottom spring minus the length of the bottom spring when the well lid is sealed at a well mouth), at the moment, the inner side of the well lid generates suction to the well lid, the tray is in a low position, the trigger arm triggers the rope winding trigger switch, the winding and unwinding motor drives the winding and unwinding drum to rotate and wind the rope, and the counterweight balance block is lifted and reset; 4. when the mine ventilator does not work due to faults or other reasons, because the weight of the well cover and the weight of the counterweight support are less than the acting force of the bottom spring on the well cover, the well cover can be smoothly jacked up, as shown in figure 4, the well mouth is opened, natural ventilation is carried out in the well, when the mine ventilator works, pressure can be manually exerted on the trigger arm, so that the tray overcomes the acting force of the bottom spring, the well cover is sealed on the well mouth again, because the trigger arm 12 extends to the outer side of the assembly groove, an operator can conveniently press the counterweight support and the well cover by pressing the trigger arm, the working condition of the mine ventilator does not work, and the mine ventilator does not work as long as power failure or mine ventilator does not workVentilator failure occurs and therefore is less likely to encounter conditions requiring an operator to depress the trigger arm. In other embodiments of the present invention, the counterweight magnets and the tray magnets may also be eliminated; the top spring also can not be arranged, and the well lid, the balance weight support and the balance weight balance block can be completely moved in a free falling mode to generate kinetic energy to impact the spring.
An embodiment of a control method of a mine explosion-proof well lid opening and closing control device is characterized in that the mine explosion-proof well lid opening and closing control device has the following four working modes, the first mode is that the inner side of a well lid is in a negative pressure environment, the acting force of a spring on a balance weight support is larger than the acting force of the spring on the balance weight support, the well lid is sealed on a well head, a tray is in a low position to trigger a rope winding trigger switch, the rope winding trigger switch controls a winding and unwinding motor to rotate forward to wind ropes, and balance weight blocks are located on the upper side of the tray at intervals; secondly, when explosion occurs in a mine, a positive pressure environment is formed on the inner side of the well cover, the well cover and the counterweight support move upwards under impact, the tray drives the counterweight balance block to move upwards continuously to a high position after moving upwards, the tray triggers the rope releasing trigger switch, and the rope releasing trigger switch controls the reverse rope releasing of the releasing motor; thirdly, after the mine is exploded, the well cover, the counterweight support and the counterweight balance block move downwards together, kinetic energy generated by free falling bodies of the well cover, the counterweight support and the counterweight balance block impacts a bottom spring until the well cover covers the well mouth, the tray is in a low position to trigger a rope winding trigger switch, the rope winding trigger switch controls a winding and unwinding motor to wind ropes in a forward rotation mode, and the counterweight balance blocks are located on the upper side of the tray at intervals to achieve resetting of the counterweight balance block; in the first, second, the third kind of mode, the mine ventilation machine is all normally worked, and the fourth kind, the mine ventilation machine is out of work, and well lid dead weight + counter weight support dead weight is lighter than the effort of spring to the counter weight support, and the well lid rebound opens the well head, and the tray interval is located the downside of counter weight balancing piece.
Claims (5)
1. A mine explosion-proof well lid opening and closing control device comprises a well lid and assembling grooves located on two sides of the well lid, wherein a balance weight support is fixed on the well lid and comprises a cross arm connected with the well lid and vertical arms arranged at two ends of the cross arm, the lower ends of the vertical arms extend into the assembling grooves, the balance weight support further comprises a tray connected to the bottoms of the vertical arms, a bottom spring used for being in contact with the bottom of the tray is arranged at the bottom of the assembling groove, and when the well lid is covered on a well mouth, the tray is in a low position; after the mine explosion, the tray upwards moves to the high level that the speed is zero, its characterized in that: the mine explosion-proof well lid opening and closing control device further comprises a winding and unwinding reel which is connected with the upper end of the counter weight balance block through a pull rope and driven by a winding and unwinding motor, a rope unwinding trigger switch which is used for being triggered by the tray at a high position to control the winding and unwinding of the motor in a reverse rotation manner is arranged on the assembly groove, a rope winding trigger switch which is used for being triggered by the tray at a low position to control the winding and unwinding of the motor in a forward rotation manner is further arranged on the assembly groove, and the rope unwinding trigger switch and the rope winding trigger switch are arranged up and down.
2. The opening and closing control device for the mine explosion-proof well lid as claimed in claim 1, wherein: the top of the assembling groove is provided with an assembling groove baffle plate which is used for being matched with the counterweight balance block in a blocking mode so as to limit the upward movement limit of the counterweight balance block, a vertical arm through hole is formed in the middle of the assembling groove baffle plate, and a pull rope through hole is formed in the periphery of the vertical arm through hole in the assembling groove baffle plate.
3. The opening and closing control device for the mine explosion-proof well lid as claimed in claim 1, wherein: the balance weight is of an annular structure, and the vertical arm penetrates through the center of the balance weight.
4. The opening and closing control device for the mine explosion-proof well lid as claimed in any one of claims 1 ~ 3, wherein the rope retracting trigger switch and the rope releasing trigger switch are arranged on the outer side wall of the assembling groove, a vertical guide groove is arranged between the rope retracting trigger switch and the rope releasing trigger switch on the groove wall of the assembling groove, the tray comprises a tray body positioned in the assembling groove, and a trigger arm extending from the vertical guide groove and used for contacting with the rope retracting trigger switch and the rope releasing trigger switch is connected to the tray body.
5. A control method of the mine explosion-proof well lid opening and closing control device according to any one of claims 1 ~ 4 is characterized in that the mine explosion-proof well lid opening and closing control device has four working modes, the first working mode is that the inner side of the well lid is in a negative pressure environment, the suction force of the well lid self weight, the self weight of a counter weight support and the negative pressure of the inner side of the well lid on the well lid is larger than the acting force of a bottom spring on a counter weight support, the well lid is sealed on a well head, a tray is in a low position to trigger a rope winding trigger switch, the rope winding trigger switch controls a winding and unwinding motor to wind a rope in a forward direction, counter weight balancing blocks are spaced on the upper side of the tray, the second working mode is that the inner side of the well lid forms a positive pressure environment when an explosion occurs in a mine, the well lid and the counter weight support move upwards due to impact, the counter weight balancing block continues to move upwards to a high position after the tray moves upwards, the tray triggers the rope unwinding trigger switch to control the winding and unwinding motor to unwind the rope, the counter weight balancing block is in a third working mode, after the explosion occurs in the mine explosion, the well lid, the counter weight support and the counter weight support move downwards, the counter weight balancing block are in the normal working mode, the normal well lid winding mode, the counter weight balancing block is smaller than the third working mode, the well lid is that the counter weight balancing block is.
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| CN201910984569.9A CN110630312B (en) | 2019-10-16 | 2019-10-16 | Mine explosion-proof well lid opening and closing control device and control method |
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| CN201910984569.9A CN110630312B (en) | 2019-10-16 | 2019-10-16 | Mine explosion-proof well lid opening and closing control device and control method |
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| CN110630312B CN110630312B (en) | 2021-04-02 |
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| JPH03206299A (en) * | 1989-12-29 | 1991-09-09 | Daimaru Bouon Kk | Panel cover for soundproofing for opening part of vertical shaft |
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| CN205477709U (en) * | 2016-01-12 | 2016-08-17 | 徐州江煤科技有限公司 | Spacing type resumes explosion -proof well lid structure fast |
| CN107905829A (en) * | 2017-11-01 | 2018-04-13 | 山东科技大学 | Mine anti-explosion well cover controller for opening and closing |
| CN208089348U (en) * | 2017-12-19 | 2018-11-13 | 山西省安瑞风机电气股份有限公司 | A kind of mining runback dry intelligent explosion proof door |
| CN109113785A (en) * | 2018-09-29 | 2019-01-01 | 中国矿业大学 | A kind of safe air-taking system of coal mine wind-lack gas |
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